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Note 10 - Fair Value Measurements (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Loans Receivable, Fair Value Disclosure | $ 13,861,000 |  | $ 13,861,000 |  | $ 15,088,000
Residential Mortgage [Member] |  |  |  |  |
Loans Receivable, Fair Value Disclosure | 13,900,000 | $ 15,200,000 | 13,900,000 | $ 15,200,000 |
Increase (Decrease) in Finance Receivables | 262,000 | (343,000) | 448,000 | (285,000) |
Residential Mortgage [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Loans Receivable, Fair Value Disclosure | 13,900,000 |  | 13,900,000 |  | 15,100,000
Financing Receivable, before Allowance for Credit Loss | 14,600,000 |  | 14,600,000 |  | $ 16,300,000
Increase (Decrease) in Finance Receivables | $ 262,000 | $ (343,000) | $ 448,000 | $ (285,000) |

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